Note 10 - Revenue Recognition - Noninterest Income (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Noninterest income (in-scope of Topic 606)		$ 783	$ 879
Noninterest income (out-of-scope of Topic 606) (2)	[1]	242	178
Total noninterest income		1,025	1,057
Maintenance Fees [Member]
Noninterest income (in-scope of Topic 606)		53	40
Overdraft Fees [Member]
Noninterest income (in-scope of Topic 606)		328	438
Other Fees [Member]
Noninterest income (in-scope of Topic 606)		70	77
Electronic Banking Fees [Member]
Noninterest income (in-scope of Topic 606)	[2]	$ 332	$ 324

[1] Noninterest income items that are out-of-scope include net realized gains (losses) on sales of securities, net gains (losses) on sales of loans, earnings on bank-owned life insurance and certain other noninterest income items.

[2] Included in other noninterest income on the consolidated statement of income.